[78-L] Pallesen Radio

[James Tennyson]

Message: 4
Date: Sun, 1 Nov 2009 22:17:57 -0500
From: "Steven C. Barr" <stevenc at interlinks.net>
Subject: Re: [78-L] Pallesen Radio
To: "78-L Mail List" <78-l at klickitat.78online.com>
Message-ID: <292C4AEDBF05452DB35F258C924D0EB0 at stevencPC>
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The short answer is yes of course it's WAY too early for those sets which 
would date from 1932-35.

Jim

----- Original Message ----- 
From: "David Lewis" <uncledavelewis at hotmail.com>
> Great early Danish ad for radio:
> http://www.europafilmtreasures.eu/PY/310/see-the-film-pallesen_radio'
> But isn't the date of "1915" impossibly early for the type of radio on
> sale here?
> Uncle Dave Lewis uncledavelewis at hotmail.com
>
Radiotephony became possible once it became possible to generate the
requisite "carrier wave!" This, in turn, was possible once "Audions" could
function as oscillators. This date should be readily available...?!

Prior to this date, carrier waves were generated using high (for then!)-
frequency alternators...mechanical AC generators. The frequency of
"carrier waves" was limited by mechanical possibilities...?!

Steven C. Barr



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